JOUENAl OF- THE COLLEGE OE SCIENCE , TOKYO IMPERIAL UNIVERSITY. 

 VOL. XL., ARTICLE 5. 



Physiological Studies 

 on 

 ScJiistostega osniinidacea (Dicks.) Mohr. 



Viscount Yasumochi TODA, 



Rigahushi. 



With two 2:)lates and two text-illustrations. 



Introduction. 



Schistostcga osmuniacea, the luminous moss, was first dis- 

 covered^^ at the end of the eighteenth century in England and in 

 Germany, and since tliat time it has been found to exist in various 

 parts of Europe"^ and also in North America,'^ 



In Japan, ^^ the moss was collected for the first time in the 

 year 1910 by K. Koyama, in the cave " Senjojiki," at Iwamurada, 

 in the province of Shinanc). 



Since then, the moss has been repeatedly found in various 

 other places^^ in the same province, about half of which are 



1) cf. "Wilson, W. : Bryologia Brittanica, p. 300. 1855, and Roth, G. : Die europäischen 

 Laubmoose, I , p. 555. 1904. 



2) Englee, a. und Peantl, K. : Die natürlichen Pflanzenfamihen, 1. Tail, Abt. 3, 1. Hälfte, 

 pp. 531 — 532. 1903 : Paeis, E. G. : Index bryologicxis, pp. 226 — 227. (Editio secunda) ; Lesqukreux, 

 li. and James, T. P. : Manual of the Mosses of North America, p. 189. 1895. 



3) MiTOSHT, M. : Über die Kultur der Schistostega osmuniacea, Schimp. (Bot. Mag., Tokyo. 

 VoL XX VI., 1912.) 



4) According to Yagi, (Journal of Education of Shinano. vol. 335. ]914) the moss was 

 found in twenty-seven places; n.w, however, it is known to exist in more than seventy locnlitie.s. 



